Rebuilding manual for Rotax aircraft engines.
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Holland Landing Ontario Canada L9N 1P2
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Rebuilding the Rotax 447 ultralight aircraft engine. |
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Disassembly - Rewind starter
Removal from engine
Tools Required
10 mm/6mm allen deep reach socket
Ratchet
Snap ring pliers
Knife
Matches
Shop supplies
Low temperature grease
Molykote G-N paste
It may be necessary to remove the recoil handle on some engines to allow removal from
aircraft. To do this tie a slip knot in the recoil rope immediately in front of the
recoil. Undo or cut the recoil rope at the handle. Disconnect the ignition suppressor box
wires, black and red from the ignition coil wire plugs, blue/red -blue/black. Remove the
four 10 mm socket head bolts and lock washers which hold the rewind starter to the engine.
The recoil will come free.
Rope removal
Remove snap ring (15), lock spring,(14 (13) circlip and pawl (11) from recoil starter. Remove
the rope sheave from the recoil. Place a blade screw driver into the hole where the recoil
rope exits the sheave.
When the screwdriver comes up against the key clamp push until the key moves releasing the
rope.
Inspection
Inspect recoil spring, rope and mechanism for damage worn or broken parts, replace as
necessary.
Maintenance.
To ensure long trouble free operation of the recoil occasional maintenance is suggested.
This maintenance involves light lubrication of the recoil rewind starter spring with low
temperature grease. Plus lubrication of the pawl lock spring with Molykote G-N paste.
Reassembly.
Tie a knot in recoil handle end of the recoil rope. Install sheave into starter housing,
ensuring notch in sheave engages in the spring hook. Rotate sheave assembly counter
clockwise until spring is fully compressed. While holding spring under tension. Release
one turn, and align hole in sheave with recoil housing rope inlet.. Install the other end
of the rope through housing and into sheave, until it passes through window in sheave.
Install key clamp into window with teeth pointing so that they bite into rope when a
pulling pressure is applied. Lock key clamp. Release tension and recoil rope will be
rewound into housing. Reinstall pawl, pawl lock, circlip, prior to installation of locking
spring lubricate with Molykote G-N paste, install spring, install lock ring.
If convenient reinstall recoil handle. Pull rope out tie slip knot at recoil, t burn end
of rope , install rope into handle tie knot in rope. release slip knot. Install recoil on
engine in reverse order or removal.
Caution:
The use of multi-purpose grease may result in improper starter operation.
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